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| Dataset Title: | Aerosol scattering and absorption coefficients at the Gruvebadet Aerosol Laboratory (Svalbard), from 2022 
|
| Institution: | CNR (Dataset ID: aerosol_optical_gvb_2022) |
| Information: | Summary
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Attributes {
s {
station_id {
String actual_range
"Gruvebadet
Gruvebadet";
String cf_role "timeseries_id";
String long_name "Id of the station in the TimeSeries";
}
latitude {
String _CoordinateAxisType "Lat";
Float32 actual_range 78.92136, 78.92136;
String axis "Y";
String ioos_category "Location";
String long_name "latitude position of the station";
String standard_name "latitude";
String units "degrees_north";
}
longitude {
String _CoordinateAxisType "Lon";
Float32 actual_range 11.86587, 11.86587;
String axis "X";
String ioos_category "Location";
String long_name "longitude position of the station";
String standard_name "longitude";
String units "degrees_east";
}
time {
String _CoordinateAxisType "Time";
Float64 actual_range 1.6410636e+9, 1.672218e+9;
String axis "T";
String ioos_category "Time";
String long_name "Date and time of the measurement";
String standard_name "time";
String time_origin "01-JAN-1970 00:00:00";
String units "seconds since 1970-01-01T00:00:00Z";
}
aerosol_absorption_coefficient_370nm {
Float32 _FillValue NaN;
Float32 actual_range -1.458, 45.402;
String comment "See full report.";
String ioos_category "Unknown";
String long_name "Aerosol absorption coefficient (1 hour average) measured at 370 nm and standard temperature and pressure";
String standard_name "volume_absorption_coefficient_of_radiative_flux_in_air_due_to_ambient_aerosol_particles";
String units "m^-1";
}
aerosol_absorption_coefficient_470nm {
Float32 _FillValue NaN;
Float32 actual_range -1.582, 39.219;
String comment "See full report.";
String ioos_category "Unknown";
String long_name "Aerosol absorption coefficient (1 hour average) measured at 470 nm and standard temperature and pressure";
String standard_name "volume_absorption_coefficient_of_radiative_flux_in_air_due_to_ambient_aerosol_particles";
String units "m^-1";
}
aerosol_absorption_coefficient_520nm {
Float32 _FillValue NaN;
Float32 actual_range -1.686, 35.545;
String comment "See full report.";
String ioos_category "Unknown";
String long_name "Aerosol absorption coefficient (1 hour average) measured at 520 nm and standard temperature and pressure";
String standard_name "volume_absorption_coefficient_of_radiative_flux_in_air_due_to_ambient_aerosol_particles";
String units "m^-1";
}
aerosol_absorption_coefficient_590nm {
Float32 _FillValue NaN;
Float32 actual_range -1.675, 31.075;
String comment "See full report.";
String ioos_category "Unknown";
String long_name "Aerosol absorption coefficient (1 hour average) measured at 590 nm and standard temperature and pressure";
String standard_name "volume_absorption_coefficient_of_radiative_flux_in_air_due_to_ambient_aerosol_particles";
String units "m^-1";
}
aerosol_absorption_coefficient_660nm {
Float32 _FillValue NaN;
Float32 actual_range -1.592, 27.547;
String comment "See full report.";
String ioos_category "Unknown";
String long_name "Aerosol absorption coefficient (1 hour average) measured at 660 nm and standard temperature and pressure";
String standard_name "volume_absorption_coefficient_of_radiative_flux_in_air_due_to_ambient_aerosol_particles";
String units "m^-1";
}
aerosol_absorption_coefficient_880nm {
Float32 _FillValue NaN;
Float32 actual_range -1.605, 23.412;
String comment "See full report.";
String ioos_category "Unknown";
String long_name "Aerosol absorption coefficient (1 hour average) measured at 880 nm and standard temperature and pressure";
String standard_name "volume_absorption_coefficient_of_radiative_flux_in_air_due_to_ambient_aerosol_particles";
String units "m^-1";
}
black_carbon_880nm {
Float32 _FillValue NaN;
Float32 actual_range -206.527, 3013.128;
String comment "See full report.";
String ioos_category "Unknown";
String long_name "Mass concentration (1 hour average) of equivalent black carbon from absorption measured at 880 nm and at standard temperature and pressure";
String standard_name "mass_concentration_of_absorption_equivalent_black_carbon_of_dry_aerosol_particles_in_air";
String units "g^m-3";
}
aerosol_scattering_coefficient_530nm {
Float32 _FillValue NaN;
Float32 actual_range 0.001, 105.086;
String comment "See full report.";
String ioos_category "Unknown";
String long_name "Aerosol scattering coefficient (1 hour average) measured at 530 nm and standard temperature and pressure";
String standard_name "volume_scattering_coefficient_of_radiative_flux_in_air_due_to_ambient_aerosol_particles";
String units "m^-1";
}
}
NC_GLOBAL {
String acknowledgement "The dataset is provided in the framework of the SIOS core data curation call [Research Council of Norway, project number 2022_SCD_01, Svalbard Integrated Arctic Earth Observing System - Knowledge Centre, operational phase]";
String cdm_data_type "TimeSeries";
String cdm_timeseries_variables "station_id,latitude,longitude";
String Conventions "ACDD-1.3, COARDS, CF-1.6";
String creator_email "mauro.mazzola@cnr.it";
String creator_name "CNR";
String creator_type "institution";
String creator_url "https://iadc.cnr.it";
Float64 Easternmost_Easting 11.86587;
String featureType "TimeSeries";
Float64 geospatial_lat_max 78.92136;
Float64 geospatial_lat_min 78.92136;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max 11.86587;
Float64 geospatial_lon_min 11.86587;
String geospatial_lon_units "degrees_east";
String history
"For the scattering coefficient the truncation error correction is performed according to Muller et al. (2009) and assuming a scattering angstrom exponent of 1.15 (Schmeisser et al., 2018). For absorption coefficient, we calculated aerosol absorption coefficient at seven wavelengths according to the formula reported by Drinovec et al. (2015). Corrected aerosol absorption coefficient was derived from the increment of aerosol attenuation measured over a time interval of 60 minutes (dATN). The attenuation was normalized by the sampling flow (F), corrected for the leakage factor z (1%), and the filter collection spot area (S=0.785 cm2). To take into account the loading effect, which would lead to an underestimation of aerosol absorption when filter loading increases, the normalized attenuation increment was divided by the factor (1-kATN), where k is derived from the simultaneous attenuation measurements on two different filter spots characterized by different sampling flows (Drinovec et al., 2015). The parameter k in formula (1) is the average value during the 1-hour time interval and it was calculated assuming that it varied linearly in time. The parameter C compensates for the enhancement of aerosol optical absorption due to the scattering of light by the filter fibers and it was equal to 1.39. Black carbon (BC) concentration derived from the aerosol absorption coefficient at 880 nm and assuming a Mass Absorption Cross section of 7.77 m2/g (according to the instrument manufacturer).. Both absorption and scattering coefficient measurements are normalized at standard pressure and temperature conditions (1 atm and 0 degC), averaged over a 1-hour period, and provided at all available wavelengths.
2024-04-27T10:32:26Z (local files)
2024-04-27T10:32:26Z https://data.iadc.cnr.it/erddap/tabledap/aerosol_optical_gvb_2022.html";
String infoUrl "https://iadc.cnr.it";
String institution "CNR";
String keywords "aerosol absorption coefficient, aerosol scattering coefficient, BC";
String keywords_vocabulary "GCMD Science Keywords";
String license "CC BY-NC: This license allows reusers to distribute, remix, adapt, and build upon the material in any medium or format for noncommercial purposes only, and only so long as attribution is given to the creator.";
Float64 Northernmost_Northing 78.92136;
String product_version "2022";
String references "Müller, T., Nowak, A., Wiedensohler, A., Sheridan, P., Laborde, M., Covert, D.S., Marinoni, A., Imre, K., Henzing, B., Roger, J.C., Martins dos Santos, S., Wilhelm, R., Wang, Y.Q., de Leeuw, G. (2009) Angular Illumination and Truncation of Three Different Integrating Nephelometers: Implications for Empirical, Size-Based Corrections, Aerosol Science and Technology, 43:6, 581-586, DOI: 10.1080/02786820902798484; Schmeisser, L., Backman, J., Ogren, J. A., Andrews, E., Asmi, E., Starkweather, S., Uttal, T., Fiebig, M., Sharma, S., Eleftheriadis, K., Vratolis, S., Bergin, M., Tunved, P., and Jefferson, A.: Seasonality of aerosol optical properties in the Arctic, Atmos. Chem. Phys., 18, 11599-11622, https://doi.org/10.5194/acp-18-11599-2018, 2018; Drinovec, L., Močnik, G., Zotter, P., Prévôt, A. S. H., Ruckstuhl, C., Coz, E., Rupakheti, M., Sciare, J., Müller, T., Wiedensohler, A., and Hansen, A. D. A.: The \"dual-spot\" Aethalometer: an improved measurement of aerosol black carbon with real-time loading compensation, Atmos. Meas. Tech., 8, 1965–1979, https://doi.org/10.5194/amt-8-1965-2015, 2015.";
String sourceUrl "(local files)";
Float64 Southernmost_Northing 78.92136;
String standard_name_vocabulary "CF Standard Name Table v55";
String summary "At the Gruvebadet Aerosol Laboratory (GAL) aerosol scattering coefficient is measured at a single wavelength (530 nm) using a Radiance Research nephelometer. Aerosol light absorption is measured 7 wavelengths (370, 470, 520, 590, 660, 880, 950 nm) measured using an AETHALOMETER AE33 from Aerosol Magee Scientific. Data is acquired continuously at 1-minute time resolution by both instruments.";
String time_coverage_end "2022-12-28T09:00:00Z";
String time_coverage_start "2022-01-01T19:00:00Z";
String title "Aerosol scattering and absorption coefficients at the Gruvebadet Aerosol Laboratory (Svalbard), from 2022";
Float64 Westernmost_Easting 11.86587;
}
}
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The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.
Tabledap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
Thus, the query is often a comma-separated list of desired variable names,
followed by a collection of
constraints (e.g., variable<value),
each preceded by '&' (which is interpreted as "AND").
For details, see the tabledap Documentation.